Can´t login to Quixel Bridge via Plugin | wrong Credentials

Hello Ladies and Gentlemen,

i can´t login to Quixel Bridge via the Plugin. i´m using Unreal Engine 4.27.1 with Windows 7.
i already tried to delete the Bridge and Megascans folder without success.
I can login to Quixel on Browser with the same credentials, so don´t know whats the problem.
Would appreciate your help!

Wish you a nice day,